Develop Reference

Why the timer is not showing the dots on the label as text each time less one?

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace Extract
{
public partial class LoadingLabel : Label
{
private int TimeToCount = 300;
private int Interval = 1000;
private System.Windows.Forms.Timer _timer;
private int counter = 0;
public LoadingLabel()
{
InitializeComponent();
this.Font = new Font("Arial", 14, FontStyle.Bold);
StartCountDownTimer(Interval, true);
}
public void StartCountDownTimer(int Interval, bool EnableTimer)
{
_timer = new System.Windows.Forms.Timer
{
Interval = Interval,
Enabled = false
};
_timer.Enabled = EnableTimer;
_timer.Tick += (sender, args) =>
{
if (counter == 0)
{
this.Text = ".";
Thread.Sleep(3);
counter++;
}
if(counter == 1)
{
this.Text = "..";
Thread.Sleep(3);
counter++;
}
if(counter == 2)
{
this.Text = "...";
Thread.Sleep(3);
counter = 0;
}
};
}
}
}
The interval is set to 1000 one second.
I want to use the interval so each second it will add another dot starting from one dot to three.
Then in the end when there are three dots start over again from one.
I tried for testing using a Thread.Sleep but it's not working it's showing only the last three dots and that's it.

In the _timer.Tick your ifs are running sequentially.
You could replace 2nd and 3rd ifs with else if or replace your code with the following:
if (counter == 3)
{
this.Text = "";
counter = 0;
}
this.Text += ".";
Thread.Sleep(3);
counter++;
Also you could eliminate the counter field since its value is always equal to the Text.Length.

Try a simple solution:
public Form1()
{
InitializeComponent();
Text = "";
timer = new System.Windows.Forms.Timer
{
Interval = 1000
};
timer.Tick += Timer_Tick;
timer.Start();
}
private void Timer_Tick(object? sender, EventArgs e)
{
if (Text.Contains("..."))
{
Text = "";
}
else
{
Text += ".";
}
}

How do I make it so the it doesnt round off the currency?

I've trying to build a simple tip calculator and get and EXACT value of what the tip should be. I've finished most of it but I'm struggling with finding the exact two numbers after the decimal place because it keeps rounding them off. Can anyone help?
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace project01LEA
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void exitToolStripMenuItem1_Click(object sender, EventArgs e)
{
this.Close();
}
private void aboutToolStripMenuItem_Click(object sender, EventArgs e)
{
MessageBox.Show("Lyndsee Armstrong\nCSIS 1400\nProject #1");
}
private void textBox1_Leave(object sender, EventArgs e)
{
//define variables
const double POOR = 0.10;
const double AVERAGE = 0.15;
const double EXCELLENT = 0.20;
double mealAmount = Convert.ToDouble(textBox1.Text);
double doubledPoor = Convert.ToInt32(POOR * mealAmount);
double doubledAverage = Convert.ToInt32(AVERAGE * mealAmount);
double doubledExcellent = Convert.ToInt32(EXCELLENT * mealAmount);
string outStr = string.Format("{0:C2}", doubledPoor);
string outStr1 = string.Format("{0:C2}", doubledAverage);
string outStr2 = string.Format("{0:C2}", doubledExcellent);
textBox2.Text = outStr;
textBox3.Text = outStr1;
textBox4.Text = outStr2;
}
}
}

Your problem is Convert.ToInt32 - that changes your floating point value to an integer value, and integers don't hold fractional values. If you eliminate those lines, this should work exactly as you want (the string formatting looks correct).

flipbook through frames using frames per second timer

Below is the code I created in attempt to make a timeline controlled by a play/stop button. I use the Timer from the Toolbox to increment time as I progress the timeline using the framesPerSecond. I feel that the timer seems to be a bit in accurate. I was wondering if any had any suggested improvements on controlling the time more accurately? I'm new to c# so bear with me on the coding. If it helps this code is for a larger project which I want to create, and this would be the control for the timeline which will eventually swap through images like a slideshow.
Thanks
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace timelineControls
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
timer1.Tick += new EventHandler(timer_Tick); // Every time timer ticks, timer_Tick will be called
}
private void cbPlayStop_CheckedChanged(object sender, EventArgs e)
{
Flipbook();
}
private void numFps_ValueChanged(object sender, EventArgs e)
{
Flipbook();
}
public void Flipbook()
{
bool result = cbPlayStop.Checked;
if (result)
{
cbPlayStop.BackColor = System.Drawing.Color.Red;
cbPlayStop.Text = "Stop";
// increment the counter at a speed of (X) per second
float framerate = (float)1.0 / (float)numFps.Value;
// Timer will tick every 1 seconds (1000 milliseconds)
timer1.Interval = (int)((float)1000 * framerate);
timer1.Enabled = true; // pauses/unpauses
timer1.Start();
}
else
{
cbPlayStop.BackColor = System.Drawing.Color.Green;
cbPlayStop.Text = "Play";
// stop timer from counting
timer1.Stop();
}
}
private int curTime = 0;
void timer_Tick(object sender, EventArgs e)
{
//MessageBox.Show("Tick"); // Alert the user
int hours = DateTime.Now.Hour;
int minutes = DateTime.Now.Minute;
int seconds = DateTime.Now.Second;
int milSeconds = DateTime.Now.Millisecond;
string timeString = hours + " : " + minutes + " : " + seconds + " : " + milSeconds;
bool loopEnabled = cbLoop.Checked;
curTime += 1;
if (loopEnabled)
{
if (curTime > pBarTime.Maximum)
{
curTime = pBarTime.Minimum;
}
}
else
{
if (curTime > pBarTime.Maximum)
{
timer1.Stop();
curTime = pBarTime.Maximum;
}
}
pBarTime.Value = curTime;
label2.Text = timeString;
lbCurTime.Text = curTime.ToString();
}
}
}

You are adding a new Tick event every time you call FlipBook, so yes, it's running multiple times.
Move that declaration to the constructor:
public Form1()
{
InitializeComponent();
timer.Tick += new EventHandler(timer_Tick);
}
In regards to the Timer's capabilities, see MSDN Timer Class
The Windows Forms Timer component is single-threaded, and is limited to an accuracy of 55 milliseconds. If you require a multithreaded timer with greater accuracy, use the Timer class in the System.Timers namespace.

How can I send Numpad Keys through my program

I'm just trying to create a program that presses Numpad 0 in the program, every few set seconds. This is what I have so far.
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace WindowsFormsApplication2
{
public partial class Form1 : Form
{
int enabled = 0;
public Form1()
{
InitializeComponent();
}
private void Start_Click(object sender, EventArgs e)
{
if (enabled == 0)
{
Start.Text = "Stop";
Timer.Enabled = true;
enabled = 1;
}
else
{
Start.Text = "Start";
Timer.Enabled = false;
enabled = 0;
label2.Text = "0";
}
}
private void Timer_Tick(object sender, EventArgs e)
{
SendKeys.Send("{NumpadIns}");
label2.Text = Convert.ToString(Convert.ToInt32(label2.Text) + 1);
}
}
}
I have tried this so far
{NumpadIns}
{NumIns}
{Num0}
{INS}
Nothing seems to work, the program I'm using with it is bound to Num Zero so it has to be Num Zero and not 0 on the top row, or Insert. Thanks (Yes I have googled but for some reason this is really hard to find).

From my experience, you should you some wrappers like Input Simulator. It is easy to use and have many pre-defined enums so you do not need to pass String argument.

How to do a 30 minute count down timer

I want my textbox1.Text to countdown for 30 minutes. So far I have this:
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
private void button1_Click(object sender, EventArgs e)
{
Timer timeX = new Timer();
timeX.Interval = 1800000;
timeX.Tick += new EventHandler(timeX_Tick);
}
void timeX_Tick(object sender, EventArgs e)
{
// what do i put here?
}
}
However I'm now stumped. I checked Google for answers but couldn't find one matching my question.

Here's a simple example similar to the code you posted:
using System;
using System.Windows.Forms;
namespace StackOverflowCountDown
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
textBox1.Text = TimeSpan.FromMinutes(30).ToString();
}
private void Form1_Load(object sender, EventArgs e) { }
private void textBox1_TextChanged(object sender, EventArgs e) { }
private void button1_Click(object sender, EventArgs e)
{
var startTime = DateTime.Now;
var timer = new Timer() { Interval = 1000 };
timer.Tick += (obj, args) =>
textBox1.Text =
(TimeSpan.FromMinutes(30) - (DateTime.Now - startTime))
.ToString("hh\\:mm\\:ss");
timer.Enabled = true;
}
}
}

Easiest thing you can do, is use a 1 minute timer:
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;
namespace countdowntimer
{
public partial class Form1 : Form
{
private Timer timeX;
private int minutesLeft;
public Form1()
{
InitializeComponent();
timeX = new Timer(){Interval = 60000};
timeX.Tick += new EventHandler(timeX_Tick);
}
private void textBox1_TextChanged(object sender, EventArgs e)
{
}
private void button1_Click(object sender, EventArgs e)
{
minutesLeft=30;
timeX.Start();
}
void timeX_Tick(object sender, EventArgs e)
{
if(minutesLeft--<=0)
{
timeX.Stop();
// Done!
}
else
{
// Not done yet...
}
textBox1.Text = minutesLeft + " mins remaining";
}
}
}

If all you want to do is set the value of your Texbox to count down from 30 Minutes. You will first need to change your timer interval to something smaller than 30Minutes. Something like timeX.Interval = 1000; which will fire every second. then set up your event like so:
int OrigTime = 1800;
void timeX_Tick(object sender, EventArgs e)
{
OrigTime--;
textBox1.Text = OrigTime/60 + ":" + ((OrigTime % 60) >= 10 ? (OrigTime % 60).ToString() : "0" + OrigTime % 60);
}
Also in your button click, you must add the following line: timeX.Enabled = true; In order to start the timer.

Your code will only get one event fired, once the 30 minutes has passed. In order to keep updating your UI continuously you'll have to make the events more frequent and add a condition inside the event handler to tell the count-down to stop once 30 minutes has passed.
You can do the time calculations easily by using TimeSpan and DateTime.
You'll also want to make sure your UI code runs on the UI thread, hence the Invoke.
timeX.Interval = 500;
...
TimeSpan timeSpan = TimeSpan.FromMinutes(30);
DataTime startedAt = DateTime.Now;
void timeX_Tick(object sender, EventArgs e)
{
if ((DateTime.Now - startedAt)<timeSpan){
Invoke(()=>{
TimeSpan remaining = timeSpan - (DateTime.Now - startedAt);
textBox.Text = remaining.ToString();
});
} else
timeX.Stop();
}

try this hope this will work for u
set timer interval=1000
minremain=1800000; //Should be in milisecond
timerplurg.satrt();
private void timerplurg_Tick(object sender, EventArgs e)
{
minremain = minremain - 1000;
string Sec = string.Empty;
string Min = string.Empty;
if (minremain <= 0)
{
lblpurgingTimer.Text = "";
timerplurg.Stop();
return;
}
else
{
var timeSpan = TimeSpan.FromMilliseconds(Convert.ToDouble(minremain));
var seconds = timeSpan.Seconds;
var minutes = timeSpan.Minutes;
if (seconds.ToString().Length.Equals(1))
{
Sec = "0" + seconds.ToString();
}
else
{
Sec = seconds.ToString();
}
if (minutes.ToString().Length.Equals(1))
{
Min = "0" + minutes.ToString();
}
else
{
Min = minutes.ToString();
}
string Totaltime = "Purge Remaing Time: " + Min + ":" + Sec;
lblpurgingTimer.Text = Totaltime;
}
}